Question

the three angle of quadrilateral are 65,55 and130.find the fourth angle

Answer 1

A=65°. B=55°. C=130°
A+B+C+D=360°
D=360-(A+B+C)
=360-(65+55+130)
=360-250 =110°

Answer 2

Heya ☺

Given that

1st angle = 65°

2nd angle = 55°

3rd angle = 130°

4th angle = ?

Solution

We know that the sum of the measures of all angles of a quadrilateral is always equal to 360°.

according to question,

65° + 55° + 130° + fourth angle = 360°

=> 250° + fourth angle = 360°

=> fourth angle = 360° - 250°

=> fourth angle = 110°




Thanks